The ring is technically called a 22-degree sun halo, and it forms as sunlight is refracted in ice crystals in high clouds, according to the National Weather Service. The crystals bend direct sunlight, projecting it elsewhere into the sky, and at a certain angle -- 22 degrees -- a halo appearing to be a circular rainbow can be seen around the sun.

In a total lunar eclipse, the full moon turns a coppery red as it passes into Earth's shadow. During the process, the moon's bright glow dims, taking on a red hue because of shimmers of sunlight and sunsets seeping through the Earth's atmosphere.

Dust and sulfur dioxide in the Earth's atmosphere can affect the size of the shadow. The moon has to be full for the total lunar eclipse to occur.